Controlling the surface chemistry of carbon xerogels using HNO3-hydrothermal oxidation

被引：82

作者：

Silva, Adrian M. T. ^{[1
]}

Machado, Bruno F. ^{[1
]}

Figueiredo, Jose L. ^{[1
]}

Faria, Joaquim L. ^{[1
]}

机构：

[1] Univ Porto, LCM, Lab Associado LSRE, Dept Engn Quim,Fac Engn, P-4200465 Oporto, Portugal

来源：

CARBON | 2009年 / 47卷 / 07期

关键词：

NITRIC-ACID; MICROPOROUS CARBON; CHEMICAL OXIDATION; ACTIVATED CARBON; TEXTURE; NANOTUBES; CATALYSTS; FUNCTIONALIZATION; COMPLEXES; AIR;

D O I：

10.1016/j.carbon.2009.02.022

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

HNO3-hydrothermal oxidation is used to finely adjust the amount of oxygenated surface groups on a carbon xerogel to a desired degree. The extent of carbon surface functionalization is found to be strongly dependent on the concentration of nitric acid and is described by first order exponential correlations. Significant textural changes are not observed at low concentrations of HNO3, while an increase of the surface area of these materials is observed at high acid concentrations (0.10-0.30 mol l(-1)) at 473 K. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1670 / 1679

页数：10

共 46 条

[1] Role of catalyst type in the selective separation of olefinic and paraffinic hydrocarbons using xerogel-based adsorbents [J].

Al-Muhtaseb, Shaheen A. .

CARBON, 2008, 46 (07) :1003-1009

[2] Wet air oxidation of nitro-aromatic compounds: Reactivity on single- and multi-component systems and surface chemistry studies with a carbon xerogel [J].

Apolinario, Angela C. ;

Silva, Adrian M. T. ;

Machado, Bruno F. ;

Gomes, Helder T. ;

Araujo, Paulo P. ;

Figueiredo, Jose L. ;

Faria, Joaquim L. .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2008, 84 (1-2) :75-86

[3] Cryo- and xerogel carbon supported PtRu for DMFC anodes [J].

Arbizzani, Catia ;

Beninati, Sabina ;

Manferrari, Elisa ;

Soavi, Francesca ;

Mastragostino, Marina .

JOURNAL OF POWER SOURCES, 2007, 172 (02) :578-586

[4] COMPARISON OF METHODS TO ASSESS SURFACE ACIDIC GROUPS ON ACTIVATED CARBONS [J].

BANDOSZ, TJ ;

JAGIELLO, J ;

SCHWARZ, JA .

ANALYTICAL CHEMISTRY, 1992, 64 (08) :891-895

[5] Surface and pore structure modification of ordered mesoporous carbons via a chemical oxidation approach [J].

Bazula, Piotr A. ;

Lu, An-Hui ;

Nitz, Joerg-Joachim ;

Schueth, Ferdi .

MICROPOROUS AND MESOPOROUS MATERIALS, 2008, 108 (1-3) :266-275

[6] A model-independent analysis of nitrogen adsorption isotherms on oxidized active carbons [J].

Choma, J ;

Jaroniec, M .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2001, 189 (1-3) :103-111

[7] Chemical oxidation of multiwalled carbon nanotubes [J].

Datsyuk, V. ;

Kalyva, M. ;

Papagelis, K. ;

Parthenios, J. ;

Tasis, D. ;

Siokou, A. ;

Kallitsis, I. ;

Galiotis, C. .

CARBON, 2008, 46 (06) :833-840

[8] A DRIFTS STUDY OF THE FORMATION OF SURFACE GROUPS ON CARBON BY OXIDATION [J].

FANNING, PE ;

VANNICE, MA .

CARBON, 1993, 31 (05) :721-730

[9] Development of carbon nanotube and carbon xerogel supported catalysts for the electro-oxidation of methanol in fuel cells [J].

Figueiredo, J. L. ;

Pereira, M. F. R. ;

Serp, P. ;

Kalck, P. ;

Samant, P. V. ;

Fernandes, J. B. .

CARBON, 2006, 44 (12) :2516-2522

[10] Modification of the surface chemistry of activated carbons [J].

Figueiredo, JL ;

Pereira, MFR ;

Freitas, MMA ;

Orfao, JJM .

CARBON, 1999, 37 (09) :1379-1389

← 1 2 3 4 5 →